Shaft-coupling.



PATENTED APR, 21, l1903.

G. GRAHAM. SHAFT COUPLING. APPLI'OATIONv FILED AUG. 11, 1902.

N0 MODEL.

HIIUL.

uff W afge QQQPPZ,

gl'l.

Ntra STATES GEORGE GRAHAM, OF ST. LOUIS, MISSOURI.

SHAFT-COUPLING.

SPECIFICATION forming part of Letters Patent NO. 726,047, dated April. 21e,` 1903. Application filed August 1l, 1902. Serial No. 119,265. (No model.)

T0 ctZZ wtom, it muy concern:

Be it known that I, GEORGE GRAHAM, a citizen of the United States, residing at St. Louis,

Missouri, have invented a certain new and useful Improvement invShaft-Oouplings, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same, referenceibeing `had to the accompanying drawings, forming `part. of this specification, in whicho Figure lis a side elevation. Fig. 2 is a View chiefly in central vertical sectional elevation; and Fig. 3 is a top View, partly in section, on the line 3 3 of Fig. l.

My invention relates toimprovements inv shaft-couplin g, and more particularlyito such devices in which a member carried by one rotatable part frictionally engages another rotatable part, whereby under normal'conditions motion is transmitted from one ofsaid parts to the other thereof, while should the` cable for driving the feeding-shaft of nailingmachines; but the invention is in no wise limited to such use and will be found of advantage in many machines. Y Referring now more particularly to th drawings, l represents the driving-shaft, and 2 the driven shaft, the said shafts being in alinement with each other and preferably having their ends abutting one against the other. A collar 3, pinned or otherwise fastened to the driven shaft to rotate therewithfhasa longitudinal openingadapted to receive the" end of the driving-shaft and is provided with longitudinal kerfs 4, by means of which are produced spring-ngers or clamping-sections 5, the said fingers or clamping-sections surrounding the said driving-shaft,whereby they can bear evenly upon the same over substantogether.

tially its entire circumference. Manifestly the said fingers can either directly engage the said driving-shaft `or a bushing 6 can be pinned or otherwisefastened upon the said shaft, and this bushing can be engaged by the said fingers. The end of the collar provided with the Afingers Vhas its outer surface tapered and threaded, as shown at 7, and the said end is received'in an internally tapered and threaded sleeve 8, which is provided with longitudinal kerfs9 topermit compression of the said collar about the saidingers. Connected to the splitlportion ofthe sleeve is what may be'termed a ,.bodyA portion l0,

which is provided with a central opening in which the driving-shaft is somewhatsnugly received, the-sleeve having the necessary rotation about the said shaft and being guided in its movement bythe shaft. A split clamp` ing-ring ll encircles the split portion of said sleeve and is provided with lugs 12, Whichreceive a clamping-screw 13.

In applying myinvention the shaft is cut in order to provide the driving-shaft 1 and the driven shaft 2.{ The bushing 6 is fastened upon the driving-shaft, and the collar 3 is fastened upon thedriven shaft, with its clamping-fingers extending about the said bushing. The sleeve8 is now screwed in position, and the clamping-fingers are forced about the bushing 6 in order to produce frictional engagement between the driving and driven parts. When the sleeve S has been properly adj usted upon the collar-fingers, the split ring is tightened and the parts are held driving-shaft rotates within the clamping members 5. The force with whieh'the'sleeve Under ordinary conditions the ro- S'engages the clampingfmembers' can be p regulated not only by the ring 1l, but `also by clampingmembers and the sleeve 8. Should ymeans of the tapering surfacesupon the IOO 6 can be readily applied to any shaft, and it is evenly engaged by the clamping-sections 5 at all points about its circumference. Preferably the split clamping-ring is supported upon an annular ange 14, extending about the body portion 10 of the sleeve 8.

I am aware that many minor changes in the construction, arrangement, and combination of the several parts of my device can be made and substituted for those herein shown and described without in the least departing from the nature and principle of my invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a shaft-coupling, a driving and -a driven shaft in substantially axial aliuemen t, a collar` rigidly attached to the periphery of one of said shafts, there being longitudinallysplit extensionsintegral therewith extending beyond the end of said shaft and frictionally engaging the periphery of the other shaft, a second collar slidable on the periphery of said second shaft with longitudinally-split extensions concentric with the first-mentioned extensions and frictionally engaging the periphery thereof, there being screw-threads on both sets of split extensions; substantially as described.

2. In a shaft-coupling, a driving land a driven shaft in substantially axial alinement, a collar rigidly attached upon the circumferential face of one of said shafts, there being longitudinally-split,wedge-shaped extensions integral therewith extending beyond the end of said shaft and frictionally engaging the exterior of the other shaft, a second collar slidable on the said second shaft with longitudinally-split overlapping extensions concentric with the first-mentioned extensions and exterior thereof, there being screwthreads on both sets of split extensions; substantially as described.

3. In a shaft-coupling, a driving and a driven shaft in substantially axial alinement, a collar rigidly attached to the periphery of one of said shafts, there being longitudinallysplit extensions integral therewith extending beyond the end of said shaft and frictionally engaging the other shaft, a second collar exterior of the said second shaft with longitudinally-split extensions of both collars concentric with the first-mentioned extensions, there being screw-threads on both sets of split extensions, and a clamping-collar embracing said split extensions; substantially as described.

4. The combination with a driving-shaft, and a driven shaft, of clamping members secured to the exterior of one of said shafts and extending about the other thereof beyond the end of the shaft on which they are secured, a second clam ping-sleeve with split extensions on the periphery of the other shaft coperating with said clamping members to cause them to clamp the shaft about which they lie, and a split ring engaging both split extensions; substantially as described.

5. In a shaft-coupling, a driving and driven shaft Whose adjacent ends are in substantially axial alinement, a collar rigidly connected to the periphery of one of said shafts, screwthreaded tapering extensions integral with said collar surrounding the proximate end portion of the second shaft, said extension having longitudinal kerfs therein, a bushing on the periphery of the said shaft Within said extensions and in frictional engagement therewith, a second, and internallyscrewthreaded sleeve with longitudinal kerfs therein mounted on the periphery of said second shaft and adapted to engage the end portions 0f said tapering extensions, and a clampingcollar with lateral screw-threaded lugs thereon adapted to secure said parts in their set position; substantially as described.

In testimony whereof I hereunto affix my signature, in the presence of two witnesses, this Sth day of August, 1902.

GEORGE GRAHAM.

Witnesses:

GALEs P. MOORE, GEORGE BAKEWELL. 

